ZIMASILK 22 Momme Mulberry Silk Sleep Mask

Quick verdict

ZIMASILK occupies a useful position between the Alaska Bear (thin, light, excellent value) and the Slip Contour (premium, contoured, expensive). It uses 22-momme mulberry silk — the denser grade you’d find in premium masks — and adds a soft silk filling that cushions the face and blocks more light than a single fabric layer. The result is one of the best mid-range masks available: more substance than a budget pick, significantly cheaper than the luxury tier, and genuinely comfortable for the majority of sleeping positions.

Our take

The defining feature of the ZIMASILK is its silk filling. Where a flat mask is a single layer of fabric, this one is a 22-momme silk shell with a soft fill inside, which gives it a cushioned, pillow-like build that flat masks don’t have. A filled mask also has more give, so it can settle around the contours of the eye area rather than lying flat across it.

The ZIMASILK takes a different approach from flat masks: a 22-momme silk shell with a soft filling. That makes it closer to a small cushion over the eyes, while an unfilled mask like the Alaska Bear is closer to wearing almost nothing. Which you prefer depends on what you’re optimizing for. Hot sleepers will lean toward the Alaska Bear’s lightness; anyone who wants more cushion will prefer the ZIMASILK.

Light blocking is meaningfully better than a flat mask. The filling creates a slight buffer between the silk and your face, which reduces the direct pressure on the eyelids while simultaneously improving the light seal at the edges. Shell plus filling is also more opaque than a single sheet of silk, which makes the ZIMASILK a darker option than an unfilled flat mask like the Alaska Bear — without any contour cups.

The strap is generous and adjustable, with a wide enough range to accommodate larger head sizes that some cheaper masks can’t fit. That matters more than it sounds: a strap that’s too short has to be worn tight, which presses the mask harder against the eyes.

The silk quality

The ZIMASILK shell uses 22-momme mulberry silk. At 22 momme, the weave is denser than the 19-momme used in the Alaska Bear and comparable to the premium materials used in the Blissy and Slip. The practical difference for a sleep mask is twofold: better light blocking from a thicker weave, and greater durability through repeated washing.

The filling is also described as silk, which adds softness and the gentle cushioning effect. Silk filling retains some of the same thermoregulating properties as the woven shell, though the combined insulation of shell plus fill makes the mask slightly warmer than an unfilled alternative.

Washing needs a little care because of the filling. Hand wash in cold water with a gentle detergent, press the water out without wringing, and lay it flat to dry so the filling stays evenly spread. Tumble drying is the quickest way to make filling clump.

Light blocking and comfort

Light blocking puts the ZIMASILK clearly above flat single-layer masks and clearly below a contoured foam design. In a dark bedroom, it’s essentially complete. In brighter rooms — a hotel with light around the curtains, or a street lamp directly outside — some light can still find its way in around the nose and edges, as it can with almost any non-contoured mask.

Comfort is the strongest category for the ZIMASILK. The filled silk is soft, and the cushioning spreads contact with the eyelids across a wider area than a flat mask would, reducing point pressure. This also makes the ZIMASILK friendlier for people who find flat masks uncomfortable against their lids, without requiring the full engineering of a contoured cup design.

The warmth trade-off is real. A shell plus filling insulates more than a single layer of silk, so on warm nights the ZIMASILK will feel warmer than an unfilled mask like the Alaska Bear. Silk still breathes better than foam, but hot sleepers should factor this in.

How it compares

Against the Alaska Bear (19-momme, flat): Alaska Bear is significantly cheaper and lighter. If breathability and minimal face weight are your priorities, choose Alaska Bear. If you want more light blocking and a cushioned feel and can spend slightly more, ZIMASILK is a meaningful upgrade.

Against the Blissy (22-momme, flat): Both use 22-momme mulberry silk. Blissy is flat with a silk-wrapped strap and OEKO-TEX certification; ZIMASILK has the silk filling for more cushion. Blissy wins on brand track record and strap quality. ZIMASILK wins on light blocking (due to fill) and value. If the filling appeals to you, ZIMASILK is the better choice at its price point.

Against the Slip Contour (22-momme, contoured): The Slip uses full 3D cups to lift silk entirely off the eyelids. For lash extensions and total no-contact blackout, only the Slip delivers that. If you don’t need lash clearance and want a cushioned feel at a lower price, ZIMASILK is a legitimate alternative.

Who this is for

• People who want 22-momme silk quality without the premium price
• Anyone who finds flat masks uncomfortable and wants something cushioned without going full contoured
• Back sleepers and light side sleepers who want more darkness than a flat mask provides
• People who have tried budget silk masks and want a noticeable upgrade

Who should skip it

• Hot sleepers who prioritize maximum breathability — the filling adds warmth; choose Alaska Bear instead
• Lash extension wearers who need full eye clearance — the Slip Contour is the correct choice
• Anyone who machine washes their masks — the filling will degrade and clump; this mask requires hand washing

Care and durability

Hand wash only in cool water with a mild silk detergent. Do not machine wash, wring, or tumble dry — the silk filling will clump and lose its even distribution. After washing, gently press flat between dry towels to absorb water, then reshape and lay flat to dry. The filling should redistribute evenly once dry.

The shell silk is durable at 22-momme; the filling is the more delicate component. Treat each wash as you’d treat washing a delicate padded item, and the mask will hold its shape better for longer.